Computer monitor or portion thereof with computer generated building icon



FIG. 1 is a front view of a computer monitor or portion thereof with computer generated building icon, showing a first embodiment of our design; and,

FIG. 2 is a front view of a computer monitor or portion thereof with computer generated building icon, showing a second embodiment of our design.

The broken lines showing a computer monitor or portion thereof form no part of the claimed design. 

CLAIM The ornamental design for a computer monitor or portion thereof with computer generated building icon, as shown and described. 